Solution: Uncle Wang originally planned the speed of X km/h, and the distance between AB and AB was Y km.

y \x- 1.5 = y \( 1+ 1/9)x①

y÷x-2 = 280÷( 1+ 1/9)x+(y-280)÷( 1+ 1/9)( 1+ 1/6)x②

Get from (1)

y= 15x③

Substitute ③ into ② to get.

13 = 280×9÷ 10x+27( 15x-280)÷35x

solve

x=25.2

y= 10x=252

A: The distance between a:AB and Shenzhen is 252 kilometers.